Kit Harington joins Spooks: The Greater Good

Kit Harington and Jennifer Ehle have joined 'Spooks: The Greater Good' alongside Peter Firth in the forthcoming Big Screen adaptation of the popular UK spy series

Kit Harington and Jennifer Ehle have joined 'Spooks: The Greater Good'.

The pair are set to star alongside Peter Firth in the forthcoming Big Screen adaptation of the popular UK spy series.

The story follows ex-MI5 agent Will Crombie (Harington) as he investigates the escape of a terrorist during a routine handover, but in order to solve the mystery, he must do so in the face of an imminent terror attack on London.

The movie will be directed by Bharat Nalluri, who also directed the TV series, while Jonathan Brackley and Sam Vincent will pen the script.

The film will be produced by the TV series' producers Jane Featherstone and Stephen Garrett alongside Ollie Madden.

Shooting for the movie is expected to kick off in early 2014.

Speaking to The Hollywood Reporter, Garrett said: "With 'Spooks: The Greater Good' we've set out to make a gripping, cinematic, contemporary spy thriller -- one that builds on the history of the show and its legacy of questioning the world around us, but which also delivers as a stand-alone film for a new, global audience."